Valve-reseating device.



No.1'770,180 PATENTED SEPT. 13, 1904.

A. M. LOGKE'IT.

VALVE' RESEATING DEVICE.

APPLICATION FILED MAY 16, 1904.

N0 MODEL,

UNTTED STATES Patented September '13, 1904.

PATENT OEEicE.

VALVE-RESEATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 770,180, dated September 13, 1904.

Application filedMay 16, 1904. Serial No. 208,286. (No model.)

To @ZZ whom, it 7mm/,y concern:

Be it known that I, ANDREW M. LocKETT, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Valve-ReseatingDevices, of which the following is a specification.

My invention relates to an improvement in machines for facing pump-valve seats or the like surfaces which are employed in the construction of the suction or force chambers of steam, electric, and hydraulic pumps or motors.

The object of my invention is to so construct a cheap, reliable, and efiicient device which is capable of being applied to the valve-seats to be refaced or ground without the necessity of taking ofiA and replacing the force or suction chambers.

The invention consists of parts which will be hereinafter more fully and clearly described, and particularly pointed out in the appended claims.

Similar numerals represent the same parts in the different figures of the drawings, in which- Figure 1 is a top view of the preferred form of my device, and Fig. 2 is a section on line a: ai of Fig. 1.

In the drawings, 1 indicates a section of the casting forming a part of the force or suction chambers adjacent to the valve-seat.

k2 is the usual valve-seat screwed into an opening of the casting, h aving a threaded opening 2.

3 is a spindle of a diameter less than the diameter of the top of the threaded opening 2, having a threaded end 11', which is screwed in the opening 2. The other end of the spindle 3 is also provided with a threaded portion 12 and a square end 13, used for turning the spindle to firmly engage the threaded opening of the valve-seat.

4 is a cutter or grinder surrounding the spindle, having' the face 6 on the lower side next to the valve-seat, and preferably on the upper side is' a circular extension 7, having two or more pins 5 firmly fixed to the cutter and having their ends projecting above the upper face thereof.

8 is a hollow frame having alower circular opening fitting the extension 7 of the cutter.

16 is aworm-wheel which is slipped on the spindle and within the frame 8 and having on its under side holes 16 to receive and firmly engage the pins 5. A circular opening 9 is provided on the upper side of the frame 8, which is adapted to receive a washer or circular disk 9 and which forms a means for supporting the balls 22, held in pockets of the superposed disk 10.

14 is a follower or disk having a circular opening and also slipped over the spindle and bearing on the top of the balls and held down and made to follow the cutter by a nut 15 engaging the upper threads 12 of the spindle 3.

The hollow frame 8, surrounding the wormwheel 16, is provided at one side with two extensions 17 17, which are provided with openings 17 17, forming bearings for a shaft 20. Fitting between the two extensions 17 17 is a worm 21, fixed to the shaft 2O and engaging the worm-wheel 16.

19 is a rod provided with extensions 18 18 and having circular openings forming bearings for the shaft 20. The said extensions 18 18 are separated such a distance as to have their inner edges in juxtaposition to the outer edges ofthe extensions 17 17 23 is a flexible shaft rotated by any suitable power and made at its end to firmly engage one end of the shaft for rotating the worm.

The operation of the device is as follows: The covers of the pump reither on the force or suction sides having been raised and the valves of the pump having been removed from their seats in either the suction or force chamber, the spindle 3 is screwed into the threaded central opening of a seat, the cutter or grinding-tool is slipped over the spindle, with its cutting edge next to the valve-seat. The frame having the worm wheel and upper washer and the worm, with the extending arm of the frame, in proper operative connection is then slipped over the spindle, so that the pins 5 of the cutter engage the openings 16 in the under side of the worm-wheel. The roller-bearing, consisting of' parts 10 and 22, upper following disk 14, and nut 15 are then placed in position, as indicated in Fig. 2 of the drawings. Power is then applied to the flexible shaft by any well-known means, preferably by an electric motor, which rapidly revolves the worm which rotates the wormwheel about the fixed spindle screwed into the Valve-seat. The worm-wheel being in engagement with the cutter, as above described, rotates the same also about the spindle, whereby the lower face of which is provided with a cutter or grinder which will quickly and cheaply reface the entire upper face of the valve-seat at one operation without disturbing other parts of the pump. As the metal is cut or ground from the valve-face the cuting edge may be made to follow and the pressure between the cutter and the seat increased or decreased by regulating the position of the screw-nut 15.

It will be Vseen from the foregoing description of the construction and method of using the same that the size and nature of the cutting or grinding tool can be quickly changed by simply unscrewing the spindle from the seatand slipping off from the bottom of the spindle the grinding-tool and inserting another tool in its place. During the operation of changing the cutter or, tool the other parts of the device are undisturbed.

Various changes may bemade in the details of my cutter or grinder and the means of operating the same without departing from the spirit of my invention, and while l have in the foregoing specification described one form of accomplishing the results aimed at yet it will be obvious to those skilled in the art the specific constructionof the frame, the means for rotating and feeding the cutter may be modified in many ways without changing in any way the operation of the mechanism or varying the invention.

Having now described my invention. what I claim as new, and desire to secure by Letters Patent, is as follows:

1. An apparatus for cutting or grinding valves and valve-seats,comprising a fixed spindle adapted to be attached to a valve-seat, a tool rotatable about the spindle adjacent to the end thereof which is secured to the valve-seat, a frame removably connected'to and surrounding the said spindle, and means withiny said frame for engaging and rotating the tool.

2. An apparatus for cutting or grinding valves and valve-seats, comprising a fixed spindle adapted to be attached to a valve-seat, a tool surrounding and rotatable about the spindle adjacent to the end thereof which is secured to the valve-seat, a frame, a gear within the frame and rotating about the said spindle and having means for engaging and rotating the tool about the spindle` and means attached to the frame for rotating the said gear.

3. An apparatus for cutting or grinding valves and valve-seats,comprising a fixed spindle adapted to be attached to a valve-seat, a tool surrounding and rotatable about the spindle adjacent to the end thereof which is secured to the valve-seat, a frame, a gear within the frame and loosely surrounding the spindle and having' a pin-and-socket engagement with the tool, and means secured to the upper end of the spindle for adjusting the gear and tool toward the valve-seat.

4. An apparatus for cutting and grinding valves and valve-seats, comprising a fixed spindle adapted to be attached to a valve-seat, a tool surrounding and rotatable about the spindle adjacent to the end thereof which is secured to the valve-seat, a frame, a worm-gear within the. frame and rotating about the said spindle and having means for engaging the tool, and a worm supported in the frame and rotating the said worm-gear.

5. An apparatus for cutting or grinding valves and valve-seats,comprising a fixed spindle adapted to be attached to a valve-seat, a tool rotatable about the spindle adjacent to the end thereof which is secured to the valve-seat, a frame removably connected to and surrounding the said spindle, means within said frame for engaging and rotating the tool, and means for feeding the frame and tool toward the end of the spindle attached to the valve-seat.

In. testimony whereof I afx my signature in presence of two witnesses.

ANDREW M. LOGKETT.

Witnesses:

TARVER WADDELL, TA'rn M. ROBINSON. 

